C#-性能-二维数组和数组的数组的性能比较

两者是3:2的消耗比例

  const int NUM = 10000;
  int[,] vec = new int[NUM, NUM]; 
  Stopwatch sw = Stopwatch.StartNew();
  for (int i = 0; i < NUM; i++)
  {
      for (int j = 0; j < NUM; j++)
      {
          var a = vec[i, j];
      }
  }
  //317ms
  Console.WriteLine(sw.ElapsedMilliseconds);
  int[][] vecarr = new int[NUM][];
  for (int i = 0; i < vecarr.Length; i++)
  {
      vecarr[i] = new int[NUM];
  }
  sw = Stopwatch.StartNew();
  for (int i = 0; i < NUM; i++)
  {
      for (int j = 0; j < NUM; j++)
      {
          var a = vecarr[i][ j];
      }
  }
  //174ms
  Console.WriteLine(sw.ElapsedMilliseconds);